Abstract: A high-Si content austenitic stainless steel, which exhibits stable acid resistance and excellent corrosion resistance in high-temperature and concentrated nitric acid, has a chemical composition comprising: C: at most 0.04%; Si: 2.5-7.0%; Mn: at most 10%; P at most 0.03%; S: at most 0.03%; N: at most 0.035%; sol. Al: at most 0.03%; Cr: 7-20%; Ni: 10-22%; optionally, one or more types selected from Nb, Ti, Ta and Zr: 0.05-0.7% in total; and the remainder being Fe and impurities, wherein a total amount of B1 type inclusions measured by a method according to JIS G0555 (2003) Annex 1 “Microscopic Testing for the Non-Metallic Inclusions on the Point Counting Principle” is not more than 0.03% by area %.

Abstract: A component for turbocharger applications, in particular in diesel engines, made of an iron-based alloy having an austenitic base structure which has a carbide structure.

Abstract: Austenitic stainless steel is disclosed herein. In the described embodiments, the austenitic stainless steel comprises 16.00 wt % of Chromium to 30.00 wt % of Chromium; 8.00 wt % of Nickel to 27.00 wt % of Nickel; no more than 7.00 wt % of Molybdenum; 0.40 wt % of Nitrogen to 0.70 wt % of Nitrogen, 1.0 wt % of Manganese to 4.00 wt % of Manganese, and less than 0.10 wt % of Carbon, wherein the ratio of the Manganese to the Nitrogen is controlled to less than or equal to 10.0. Austenitic stainless steel based on specified minimum PREN (Pitting Resistance Equivalent Number) values is also disclosed. (1) PRE=wt % Cr+3.3×wt % (Mo)+16 wt % N>=25 for N in range of 0.40-0.70. (2) PRE=wt % Cr+3.3×wt % (Mo+W)+16 wt % N>=27 for N in range of 0.40-0.70 with W present.

Abstract: A steel piston ring and a steel cylinder liner are described which comprise as the main body a steel composition which has good nitridability. The steel composition consists of the following elements: 0-0.5 weight % B, 0.5-1.2 weight % C, 4.0-20.0 weight % Cr, 0-2.0 weight % Cu, 45.30-91.25 weight % Fe, 0.1-3.0 weight % Mn, 0.1-3.0 weight % Mo, 0-0.05 weight % Nb, 2.0-12.0 weight % Ni, 0-0.1 weight % P, 0-0.05 weight % Pb, 0-0.05 weight % S, 2.0-10.0 weight % Si, 0-0.05 weight % Sn, 0.05-2.0 weight % V, 0-0.2 weight % Ti and 0-0.5 weight % W. The steel piston ring and the steel cylinder liner can be manufactured in a casting process using the machinery and technology employed for the manufacture of cast iron parts.

Abstract: Heat-resistant, austenitic cast steel comprising by mass 0.3-0.6% of C, 1.1-2% of Si, 1.5% or less of Mn, 17.5-22.5% of Cr, 8-13% of Ni, 1.5-4% as (W+2Mo) of at least one of W and Mo, 1-4% of Nb, 0.01-0.3% of N, 0.01-0.5% of S, the balance being Fe and inevitable impurities, and meeting the following formulae (1), (2), (3) and (4): 0.05?(C—Nb/8)?0.6??(1), 17.5?17.5Si?(W+2Mo)??(2), 5.6Si+(W+2Mo)?13.7??(3), and 0.08Si+(C—Nb/8)+0.015Cr+0.011Ni+0.03W+0.02Mo<0.96??(4), wherein the symbol of each element corresponds to the amount (% by mass) of each element in the cast steel.

Abstract: The present invention relates an iron based brazing material comprising an alloy consisting essentially of: 15 to 30 wt % chromium (Cr); 0 to 5.0 wt % manganese (Mn); 15 to 30 wt % nickel (Ni); 1.0 to 12 wt % molybdenum (Mo); 0 to 4.0 wt % copper (Cu); 0 to 1.0 wt % nitrogen (N); 0 to 20 wt % silicone (Si); 0 to 2.0 wt % boron (B); 0 to 16 wt % phosphorus (P); optionally 0.0 to 2.5 wt % of each of one or more of elements selected from the group consisting of carbon (C), vanadium (V), titanium (Ti), tungsten (W), aluminum (Al), niobium (Nb), hafnium (Hf), and tantalum (Ta); the alloy being balanced with Fe, and small inevitable amounts of contaminating elements; and wherein Si, B and P are in amounts effective to lower melting temperature, and Si, B, and P are contained in amounts according to the following formula: Index=wt % P+1.1×wt % Si+3×wt % B, and the value of the Index is within the range of from about 5 wt % to about 20.

Abstract: Disclosed is a stainless steel containing, by mass, 0.05% or less carbon, 1.5 to smaller than 3.5% Si, 3.0% or less Mn, 6.0 to 12.0% Cr, 4.0 to 10.0% Ni, 10.0% or less Co, 6.0% or less Cu, 0.5 to 3.0% Ti, 0 to 2.0% Al, less than 0.4% Mo, not more than 0.01% nitrogen, and the balance of Fe and unavoidable impurities. Preferably, it has a hardness of not lower than 59 HRC and may contain not more than 1.0% Nb and/or not more than 1.0% Ta. Alternatively, the stainless steel may further contain not more than 0.1% of Zr. The process for producing the steel includes producing a steel having a composition as described above by a consumable electrode remelting process, and then subjecting the steel to a solution treatment at a temperature of 1000 to 1150° C. and an aging treatment at a temperature of 400 to 550° C., thereby aging the stainless steel to a hardness of not lower than 59 HRC.

Abstract: In order to provide a material of low cost that is suitable to produce parts or coatings having a high wear and also high chemical resistance, an alloy is proposed comprising 13 to 16 percent by weight nickel (Ni), 13.5 to 16.5 percent by weight of chromium (Cr), 0.5 to 3 percent by weight of molybdenum (Mo), 3.5 to 4.5 percent by weight of silicon (Si), 3.5 to 4 percent by weight of boron (B) and 1.5 to 2.1 percent by weight of carbon (C), balance iron (Fe).

Abstract: A heat resistant alloy comprising, in % by weight, over 0.6% to not more than 0.9% of C, up to 2.5% of Si, up to 3.0% of Mn, 20 to 28% of Cr, 8 to 55% of Ni, 0.01 to 0.8% of Ti and 0.05 to 1.5% of Nb, the balance being Fe and inevitable impurities, the value of (Ti+Nb)/C being 0.12 to 0.29 in atomic % ratio. When the alloy further contains up to 0.5% of Zr, the value of (Ti+Nb+Zr)/C is 0.12 to 0.29 in atomic % ratio. When the alloy is heated at a temperature of at least about 800 degrees C., a fine Ti—Nb—Cr carbide or Ti—Nb—Zr—Cr carbide precipitates within grains to thereby retard creep deformation and give an improved creep rupture strength. The alloy is therefore suitable as a material for hydrogen production reforming tubes.

Abstract: The object of the present invention is to provide at a low cost iron-base heat- and corrosion-resistant brazing material which make it possible to braze parts made of a base metal selected from among various stainless steels, particularly ferritic stainless steels, at a practical temperature (of 1120° C. or lower) and are excellent in the wetting property against the base metal and which can attain excellent resistance to corrosion by sulfuric acid or nitric acid and high strength without coarsening the structure of the base metal. The iron-base heat- and corrosion-resistant brazing material is characterized by comprising 30 to 75 wt % of Fe, 35 wt % or less of Ni and 5 to 20 wt % of Cr in a total amount of Ni and Cr of 15 to 50 wt %, and 7 wt % or less of Si and 4 to 10 wt % of P in a total amount of Si and P of 9 to 13 wt %. The iron-base heat- and corrosion-resistant brazing material further comprising 0.5 to 5 wt % of Mo and/or 0.

Abstract: A cast, austenitic steel composed essentially of, expressed in weight percent of the total composition, about 0.4 to about 0.7 C, about 20 to about 30 Cr, about 20 to about 30 Ni, about 0.5 to about 1 Mn, about 0.6 to about 2 Si, about 0.05 to about 1 Nb, about 0.05 to about 1 W, about 0.05 to about 1.0 Mo, balance Fe, the steel being essentially free of Ti and Co, the steel characterized by at least one microstructural component selected from the group consisting of MC, M23C6, and M(C, N).

Abstract: Disclosed is a stainless steel containing, by mass, 0.05% or less carbon, 1.5 to smaller than 3.5% Si, 3.0% or less Mn, 6.0 to 12.0% Cr, 4.0 to 10.0% Ni, 10.0% or less Co, 6.0% or less Cu, 0.5 to 3.0% Ti, 0 to 2.0% Al, not more than 1.0% Mo, not more than 0.01% nitrogen, and the balance of Fe and unavoidable impurities. Preferably, it has a hardness of not lower than 59 HRC and may contain not more than 1.0% Nb and/or not more than 1.0% Ta. Alternatively, the stainless steel may further contain not more than 0.1% of Zr. The process for producing the steel includes producing a steel having a composition as described above by a consumable electrode remelting process, and then subjecting the steel to a solution treatment at a temperature of 1000 to 1150° C. and an aging treatment at a temperature of 400 to 550° C., thereby aging the stainless steel to a hardness of not lower than 59 HRC.

Abstract: An iron based brazing material for joining objects by brazing represents an alloy, which apart from iron contains approximately 9-30% Cr, approximately 0-8% Mn, approximately 0-25% Ni, 0-1% N, a maximum of 7% Mo, less than about 6% Si, approximately 0-2% B and/or about 0-15% P, all stated in weight percent, which addition of Si, P, and B in combination or separately lowers the liquidus temperature, that is the temperature at which the brazing material is completely melted. A brazed product is manufactured by brazing of iron based objects with an iron based brazing material which is alloyed with a liquidus lowering element as Si, P and B.

Abstract: The invention is directed to anti-corrosive alloys and relates in particular to an alloy containing cobalt, chromium, aluminum, yttrium, silicon, a metal from the second main group, together with the corresponding oxide, in the following proportions: chromium (Cr) 26.0-30%; aluminum (Al) 5.5-13.0%; yttrium (Y) 0.3-1.5%; silicon (Si) 1.5-4.5%; metal from the second main group (magnesium, calcium, barium, strontium) 0.1-2.0%; oxide of the corresponding metal from the second main group 0.1-2.0%; cobalt (Co) remaining percentage. Preferably, tantalum (Ta) is also added in a proportion of 0.5-4.0%, and the remaining percentage of cobalt is replaced by a remaining percentage of Me, Me being understood to mean a metal which may be nickel (Ni) or iron (Fe) or cobalt (Co) or a composition comprising Ni—Fe—Co, Ni—Fe, Ni—Co, Co—Fe.

Abstract: The present invention provides a highly corrosion-resistant alloy used as a boiler tube in equipment the energy source of which is obtained by burning fossil fuel or waste, a steel tube for which the alloy is used, and a process for producing the steel tube. The alloy comprises up to 0.05% of C, 1.0 to 2.6% of Si, 0.02 to 1.0% of Mn, 20.0 to 28.0% of Cr, 18.0 to 30.0% of Ni, up to 4.0% of Mo, up to 0.05% of Al, 0.05 to 0.30% of N and the balance Fe and unavoidable impurities. Furthermore, the present invention also provides a multilayer steel tube having the alloy as a liner material and a standardized boiler tube as a base layer material, and a process for producing the multilayer steel tube.

Abstract: For diminishing coking in a petrochemical process, coking-resistant steel containing by weight:about 0.05% to 0.06% of carbon;about 2.5% to 5% of silicon;10% to 20% of chromium;10% to 15% of nickel0.5% to 1.5% of manganese;0-0.5% of titanium;at most 0.8% of aluminium;the complement to 100% being essentially iron,can be used to manufacture tubes and plates for producing reactors or elements thereof, as well as for coatings of the internal walls of furnaces, reactors or tubings where coking can occur.

Abstract: An austenitic steel alloy is provided having improved creep strength at high temperature. The improved creep strength performance is achieved by adding a limited amount of silicon to the steel alloy along with increased amounts of nitrogen and columbium, also known as niobium. The added columbium ties up the carbon in the alloy composition to prevent sensitization promotion and premature corrosion-fatigue failures. The resulting steel alloy provides improved strength, improved carburization resistance, and maintains good weldability.

Abstract: An austenitic, stainless steel alloy having a good combination of galling resistance and corrosion resistance is disclosed containing in weight percent about:______________________________________ Broad Intermediate Preferred ______________________________________ C 0.25 max. 0.02-0.15 0.05-0.12 Mn 3-10 4-8 5-7 Si 2.25-5 2.5-4.5 3-4 Cr 15-23 16.5-21 17.5-19 Ni 2-12 4-10 6-9 Mo 0.5-4.0 0.5-2.5 0.75-1.5 N 0.35 max. 0.05-0.25 0.10-0.20 ______________________________________and the balance of the alloy is essentially iron. This alloy also has good resistance to formation of deformation-induced martensite as indicated by the alloy's low work-hardening rate and low magnetic permeability when cold-rolled to a 50% reduction in cross-sectional area.

Abstract: Fe-Ni based soft magnetic alloys having nanocrystalline particles substantially uniformly distributed throughout an amorphous matrix are disclosed. The soft magnetic alloys of the present invention may be represented by the general formula:(Fe.sub.1-x Ni.sub.x).sub.a M.sub.b (B.sub.1-y Si.sub.y).sub.cwhere M is a metal chosen from the group consisting of Mo, Cr, Hf, Nb, Ta, Ti, V, W, Zr. The quantity "x" is between about 0.2 and about 0.9; a is between about 60 and 90; b is between about 0.1 and 10; y is between 0 and 0.5; and c is between about 0.1 and about 30, with the stipulation that all the elements, plus impurities, add up to 100. Also described is a process for making the nanocrystalline alloys and for optimizing certain magnetic properties of said alloys via a two step anneal.

Abstract: A heat-resistant alloy having a high creep rupture strength under high-temperature low-stress conditions and excellent resistance to carburization even when used at a high temperature exceeding 1100.degree. C. The alloy comprises, in % by weight, more than 0.1% to less than 1.5% of C, more than 2% to less than 3% of Si, more than 0% to less than 2% of Mn, more than 20% to less than 30% of Cr, more than 25% to less than 40% of Ni, more than 0.6% to less than 2% of Al, and the balance Fe and inevitable impurities. When required, the alloy contains at least one component selected from the group consisting of 0.01 to 0.5% of Zr, up to 0.2% of N, 0.2 to 2.0% of Nb, 0.2 to 2.0% of W and 0.01 to 03% of Ti.

Abstract: A soft magnetic alloy having a composition of general formula:(Fe.sub.1-a Ni.sub.a).sub.100-x-y-z-p-q Cu.sub.x Si.sub.y B.sub.z Cr.sub.p M.sup.1.sub.q (I)wherein M.sup.1 is V or Mn or a mixture of V and Mn, 0.ltoreq.a.ltoreq.0.5, 0.1.ltoreq.x.ltoreq.5, 6.ltoreq.y.ltoreq.20, 6.ltoreq.z.ltoreq.20, 15.ltoreq.y+z.ltoreq.30, 0.5.ltoreq.p.ltoreq.10, and 0.5.ltoreq.q.ltoreq.10 and possessing a fine crystalline phase is suitable as a core, especially a wound core and a compressed powder core.

Abstract: Ferrous group shape memory alloys consisting essentially of Cr: 16.0-21.0 wt %, Si: 3.0-7.0 wt % and Ni: 11.0-21.0 wt % and satisfying Ni wt %.gtoreq.[0.67.times.{Cr+1.2.times.(Si+Ti+Zr+Hf+V+Nb+Ta)}-] wt % and (Cr+Si) wt %.gtoreq.20 wt %, these ferrous-group shape-memory alloys having a corrosion resistance, a shape-memorizing properties, an intergranular corrosion resistance and a stress corrosion cracking resistance in nitric acid for nuclear fuel reprocessing plants and high-temperature, high-pressure water for light-water reactors.

Abstract: Alloys are provided which consist essentially by weight percentages of from about 10.5% to about 28% Ni, from about 14.8% to about 23% Cr, from about 3% to about 6.6% Si, up to about 4% Al, from about 3% to about 6.6% total content of Si plus Al, from about 0.2% to about 4% Mn, from about 0.15% to about 1.6% Mo, from about 0.25% to about 1.25% W, from about 0.10% to about 0.75% Cb, from about 0.12% to about 1.2% C, from about 0.05% to about 0.45% Ti, and the balance essentially iron and the usual impurities. The alloys may optionally contain up to about 0.1% Ca, up to about 0.25% Zr, up to about 0.15% B, up to about 0.3% N and up to about 0.15% of rare earth components.

Abstract: A heat-resistant alloy comprising, in % by weight, 0.3-0.8% of C, 0.5-3% of Si, over 0% to not greater than 2% of Mn, at least 23% to less than 30% of Cr, 40-55% of Ni, 0.2-1.8% of Nb, over 0.08% to not greater than 0.2% of N, 0.01-0.5% of Ti and/or 0.01-0.5% of Zr, and the balance Fe and inevitable impurities. The alloy is usable at high temperatures exceeding 1100.degree. C. with high creep rupture strength and excellent resistance to oxidation and to carburization, further exhibiting high creep deformation resistance at high temperatures and high ductility after aging.

Abstract: A heat-resistant austenitic stainless steel is disclosed. This steel essentially consists of: not more than 0.06% C, 1-4% Si, 0.5-4% mn, not more than 0.035% P, not more than 0.005% S, 10-17% Ni, 14-20% Cr, 1-4% Mo, 0.01-0.5% Al, not more than 0.035% N, and balance essentially Fe, and may further contain small amounts of any of Cu, REM and B and the composition thereof is adjusted so that a limited amount of .delta.-ferrite appears in solidification. The steel has excellent hot salt corrosion resistance, weldability, salt errosion resistance of the weld and hot-workability.

Abstract: A corrosion resistant metal alloy having improved formability and workability is disclosed which alloy contains in weight percent about 25% to 45% nickel, about 12% to 32% chromium, of at least one of 0.1% to 2.0% columbium, 0.2% to 4.0% tantalum, and 0.05% to 1.0% vanadium, up to about 0.20% carbon, about 0.05% to 0.50% nitrogen, about 0.001% to 0.02% boron and the balance being iron plus impurities and wherein the carbon and nitrogen content are controlled so that the amount of free carbon and nitrogen defined as ##EQU1## is greater than 0.14% and less than 0.29%. The alloy may also include in limited amounts one of aluminum, titanium, silicon, manganese, cobalt, molybdenum, tungsten, zirconium, yttrium, cerium and other rare earth metals.

Abstract: Alloys are provided which consist essentially of between about 4% and 18.5% by weight nickel, from about 24% to about 30% by weight chromium, from about 0.35 to about 1% by weight molybdenum, from about 2.7% to about 4.5% by weight copper, from about 2.7% to about 4.5% by weight silicon, up to about 1.5% by weight manganese, up to about 0.25% by weight nitrogen, up to about 0.8% by weight columbium (niobium), up to about 1.0% by weight tantalum, up to about 0.007% by weight boron, up to about 0.35% by weight vanadium, up to about 0.8% by weight tungsten, up to about 0.08% by weight carbon, up to about 0.6% by weight titanium and the balance essentially iron. Small amounts of cobalt as naturally occur in some ores may be present but are considered a part of the nickel content.

Abstract: A corrosion resistant metal alloy having improved formability and workability is disclosed which alloy contains in weight percent about 25% to 45% nickel, about 12% to 32% chromium, of at least one of 0.1% to 2.0% columbium, 0.2% to 4.0% tantalum, and 0.05% to 1.0% vanadium, up to about 0.20% carbon, about 0.05% to 0.50% nitrogen and the balance being iron plus impurities and wherein the carbon and nitrogen content are controlled so that the amount of free carbon and nitrogen defined as ##EQU1## is greater than 0.14% and less than 0.29%. The alloy may also include in limited amounts one of aluminum, titanium, silicon, manganese, cobalt, molydenum, tungsten, boron, zirconium, yttrium, cerium and other rare earth metals.

Abstract: An austenitic stainless steel exhibiting improved resistance to corrosion caused by nitric acid is disclosed, which consists essentially of:C: not more than 0.03% by weight, Si: 2-6% by weight,Mn: 0.1-8% by weight, Cr: 20-35% by weight,Ni: 17-50% by weight, Mg: not more than 0.02%,at least one of Nb, Ti and Ta in the total amount of 8.times.C(%) or more, but 1.0% by weight or less,S: not more than 0.003% by weight,Oxygen: not more than 0.003% by weight,N: not more than 0.03% by weight,P: not more than 0.02% by weight,Fe and incidental impurities: balancethe composition further satisfying the following relationships;-10.ltoreq.Ni(Bal).ltoreq.-0.1Cr(%).gtoreq.(7/4)Si(%)+16.5Mg(%)-0.75.times.S(%)-1.5.times.Oxygen(%).gtoreq.0wherein, Ni(Bal)=30.times.C(%)+0.5.times.Mn(%)+Ni(%)+8.2-1.1.times.[1.5.times.Si(%) +Cr(%)].

Abstract: This invention relates to a welding material for welding a high-Si austenite stainless steel, capable of ensuring a high corrosion resistance of the weld metal in hot nitric acid of high concentration, while maintaining a toughness of the weld metal not smaller than 2 Kg-m/cm.sup.2, and the method of application therefor. The welding material has a composition containing not greater than 0.015% of C, 5 to 7% of Si, not greater than 2% of Mn, 15 to 20% of Cr, 10 to 22% of Ni, not greater than 0.02% of N, not greater than 0.45% of one or both of Nb and Ta, and the balance substantially Fe and inevitable impurities the sum of C and N contents is selected to be not greater than 0.03% and the sum of Nb and Ta contents is selected to be not smaller than 15.times.(C+N)%. The Ni-balance value given by the following formula ranges between -4 and -2.Ni balance value=% Ni+30(%C+%N)+0.5(%Mn)-1.1(%Cr+1.5.times.%Si)+8.